@setfilename ../../info/calc
@c [title]
@settitle GNU Emacs Calc Manual
+@documentencoding UTF-8
@setchapternewpage odd
@comment %**end of header (This is for running Texinfo on a region.)
GNU Emacs @value{EMACSVER}.
@end ifnotinfo
-Copyright @copyright{} 1990--1991, 2001--2013 Free Software Foundation, Inc.
+Copyright @copyright{} 1990--1991, 2001--2014 Free Software Foundation, Inc.
@quotation
Permission is granted to copy, distribute and/or modify this document
@c [begin]
@ifnottex
@node Top, Getting Started, (dir), (dir)
-@chapter The GNU Emacs Calculator
+@top The GNU Emacs Calculator
@noindent
@dfn{Calc} is an advanced desk calculator and mathematical tool
leaving the first, third, fourth, and so on; @kbd{M-3 M-@key{DEL}} deletes
the third stack element.
+The above commands do not depend on the location of the cursor.
+If the customizable variable @code{calc-context-sensitive-enter} is
+non-@code{nil} (@pxref{Customizing Calc}), these commands will become
+context sensitive. For example, instead of duplicating the top of the stack,
+@key{RET} will copy the element at the cursor to the top of the
+stack. With a positive numeric prefix, a copy of the element at the
+cursor and the appropriate number of preceding elements will be placed
+at the top of the stack. A negative prefix will still duplicate the
+specified element of the stack regardless of the cursor position.
+Similarly, @key{DEL} will remove the corresponding elements from the
+stack.
+
@kindex @key{TAB}
@pindex calc-roll-down
To exchange the top two elements of the stack, press @key{TAB}
$$ a_{i+1} = { a_i + b_i \over 2 } , \qquad b_{i+1} = \sqrt{a_i b_i} $$
@end tex
-@cindex Root-mean-square
-Another commonly used mean, the RMS (root-mean-square), can be computed
-for a vector of numbers simply by using the @kbd{A} command.
+@c @cindex Root-mean-square
+@c Another commonly used mean, the RMS (root-mean-square), can be computed
+@c for a vector of numbers simply by using the @kbd{A} command.
@kindex u S
@pindex calc-vector-sdev
based on a fundamental physical process (although there are efforts to
change this) is the kilogram, which was originally defined as the mass
of one liter of water, but is now defined as the mass of the
-International Prototype Kilogram (IPK), a cylinder of platinum-iridium
-kept at the Bureau International des Poids et Mesures in S@`evres,
+international prototype of the kilogram (IPK), a cylinder of platinum-iridium
+kept at the Bureau international des poids et mesures in S@`evres,
France. (There are several copies of the IPK throughout the world.)
The British imperial units, once defined in terms of physical objects,
were redefined in 1963 in terms of SI units. The US customary units,
99@dots{}9. The least significant digit is @var{d0}; the last digit,
@var{dn}, which is always nonzero, is the most significant digit. For
example, the integer @mathit{-12345678} might be stored as
-@samp{(bigneg 678 345 12)}.
+@samp{(bigneg 678 345 12)}.
The distinction between small and large integers is entirely hidden from
the user. In @code{defmath} definitions, the Lisp predicate @code{integerp}
@end defvar
@defvar calc-context-sensitive-enter
-The command @code{calc-enter} will typically duplicate the top of the
-stack. If @code{calc-context-sensitive-enter} is non-@code{nil},
-then the @code{calc-enter} will copy the element at the cursor to the
-top of the stack. The default value of
-@code{calc-context-sensitive-enter} is @code{nil}.
+The commands @code{calc-enter} and @code{calc-pop} will typically
+duplicate the top of the stack. If
+@code{calc-context-sensitive-enter} is non-@code{nil}, then the
+@code{calc-enter} will copy the element at the cursor to the
+top of the stack and @code{calc-pop} will delete the element at the
+cursor. The default value of @code{calc-context-sensitive-enter} is
+@code{nil}.
@end defvar
@defvar calc-undo-length
HCoop / bpt / emacs.git / blobdiff